Celebrating our history. building the future.

Watch our Anniversary Video!

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Transmission

Any configuration. Any voltage. Any terrain.

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Irby is Looking for A Few Good (Line)Men

We’re hiring! Take a look at our careers page for more information.

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Emergency Restoration

Hurricane season is here and we are ready!

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Bozeman Road Distribution Work

Featured Distribution Project

Irby Construction was awarded the Bozeman Road Project in May of 2017 by Entergy Mississippi. The project scope consisted of adding three new circuits out of the existing Bozeman Rd Substation in Madison, MS due to a new transformer addition.

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Port St. Joe to Callaway 230kV Rebuild

Emergency Storm Restoration

Hurricane Michael made landfall on October 10th, 2018 near Mexico Beach, Florida. Duke Energy’s 230kV 34-mile PX line from Port St. Joe to Callaway was damaged beyond repair.

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IRBY CONSTRUCTION COMPANY builds power infrastructure on a turnkey basis. As a premier transmission construction company, we have built high-voltage power line projects that span the entire United States— from the pacific coast to the eastern seaboard. Our work has even taken us to other countries across the globe. Irby also constructs and connects substations and distribution systems. So, our scope of services covers power delivery systems every step of the way—from generation, down the line and into homes and businesses. 

Transmission
Telecommunications
Distribution
Outdoor Lighting
Substation
Renewables
Data Centers
Foundation
BESS
Emergency Restoration

We’re Like Family at Irby

We started as a family business and have carried that culture forward. There’s a pride that comes with working here and it shows in our work. Irby Construction Company’s extraordinary record of success can be attributed to our people who are among the most respected, experienced and talented in the industry. More than a company name that has been around for generations, Irby brings to the table a team of people who have been in this business for decades.

Want to learn more about us? Watch the video here or on Vimeo.

Irby Construction: Proud Past, Clear Future from Irby Construction Company on Vimeo.

FEATURED PROJECTS

Hurricanes Helene & Milton Emergency Response

Hurricanes Helene & Milton Emergency Response

September 4, 2025
Destin Resiliency and Rebuild Projects

Destin Resiliency and Rebuild Projects

September 4, 2025
SMT Houston IV BESS Project

SMT Houston IV BESS Project

September 4, 2025
Duke Energy – Mosaic APW AF Line

Duke Energy – Mosaic APW AF Line

September 3, 2025
Jefferson Davis Electric Cooperative 230KV T-Line System Loop Upgrade

Jefferson Davis Electric Cooperative 230KV T-Line System Loop Upgrade

September 3, 2025
Storm Damage Assessment After Hurricane Ian

Storm Damage Assessment After Hurricane Ian

August 11, 2023
Patterson – S. Nashville 138kV Transmission Line Rebuild Project

Patterson – S. Nashville 138kV Transmission Line Rebuild Project

October 12, 2022
Entergy Harahan-Avondale

Entergy Harahan-Avondale

July 20, 2022
FPL EVolution HUB

FPL EVolution HUB

February 10, 2022
New England Clean Energy Connect Transmission Line

New England Clean Energy Connect Transmission Line

February 1, 2022
Sunshine Gateway Battery Energy Storage Center

Sunshine Gateway Battery Energy Storage Center

August 27, 2021
Manatee Battery Energy Storage Center

Manatee Battery Energy Storage Center

June 22, 2021

WATTS IN THE NEWS

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CONTACT US

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JOIN OUR TEAM

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CAREERS

EMPLOYEE INFO

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WORK WITH US

Learn more about our subcontractor management program by clicking here.

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CONTACT HR DIRECT:

Contact HR directly by clicking here.

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CONTACT US:

318 Old Highway 49 South
Richland, Mississippi 39218-9449

Phone: 601-709-4729
Email: [email protected]

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Irby Construction Company

Irby Construction Company

18 hours ago

Irby Construction Company
Taking it to new heights 🚁⚡When access gets tough, innovation takes over—setting structures from the sky to keep the grid moving forward.#IrbyConstruction #AbsolutePerformance #wearequanta #quantaprojects Quanta Services, Inc. ... See MoreSee Less

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Irby Construction Company

3 days ago

Irby Construction Company
Sun up to power up ⚡️Proud of the crews who show up early, work hard, and power what matters.#IrbyConstruction #AbsolutePerformance #wearequanta #quantaprojects Quanta Services, Inc. ... See MoreSee Less

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Irby Construction Company

4 days ago

Irby Construction Company
To the moms on our crews, in our offices, and at home supporting it all—thank you for everything you do.You’re the real power behind what we build. ⚡💙Happy Mother’s Day!#IrbyConstruction #AbsolutePerformance #WeAreQuanta #HappyMothersDay #MothersDay Quanta Services, Inc. ... See MoreSee Less

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Irby Construction Company

6 days ago

Irby Construction Company
As we wrap up Construction Safety Week, one thing is clear: safety doesn’t stop here.At Irby Construction Company, it is built into every plan, every conversation, and every decision. The commitment to looking out for one another and doing the work the right way carries forward long after this week ends.Let’s keep the focus where it belongs: on protecting our people and strengthening the safety culture that makes it possible. 🦺#IrbyConstruction #AbsolutePerformance #WeAreQuanta #ConstructionSafetyWeek #CSW Quanta Services, Inc. ... See MoreSee Less

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Irby Construction Company

7 days ago

Irby Construction Company
RESPECT. The last Construction Safety Week tenet centers on respect: for the work, the risks, and each other.High-risk tasks demand more than awareness, they require careful planning, strong controls, and accountability from every person on the job. Safety isn’t static. When conditions shift, the plan should too.Owning that process at every stage is how we build a culture where safety is shared, continuous, and non-negotiable.#IrbyConstruction #AbsolutePerformance #WeAreQuanta #ConstructionSafetyWeek #CSW Quanta Services, Inc. ... See MoreSee Less

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Irby Construction Company

1 week ago

Irby Construction Company
RESPOND.The second theme of Construction Safety Week is all about taking action by responding.Spotting hazards is only step one, while putting the right controls in place before work begins is what keeps crews safe. A structured approach helps teams evaluate risks and determine how to remove or reduce them through smarter planning and jobsite controls.When hazard recognition becomes real, preventive response and action, we protect our people, our communities, and every phase of the work. 🦺Read more here: www.constructionsafetyweek.com/plan-for-safety-week/safety-week-2026/#IrbyConstruction #AbsolutePerformance #wearequanta #constructionsafetyweek #CSW Quanta Services, Inc. ... See MoreSee Less

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Irby Construction Company is a wholly-owned subsidiary of Quanta Services, Inc. (NYSE: PWR).